J. Iwan Jones
A5019479565- Fish Ecology and Management Studies
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Invertebrate Ecology and Behavior
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Isotope Analysis in Ecology
- Hydrology and Sediment Transport Processes
- Aquatic Ecosystems and Phytoplankton Dynamics
- Environmental DNA in Biodiversity Studies
- Marine and fisheries research
- Marine and coastal ecosystems
- Soil erosion and sediment transport
- Microplastics and Plastic Pollution
- Species Distribution and Climate Change
- Identification and Quantification in Food
- Marine Biology and Environmental Chemistry
- Fish Biology and Ecology Studies
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Water Quality and Pollution Assessment
- Coastal wetland ecosystem dynamics
- Peatlands and Wetlands Ecology
- Groundwater flow and contamination studies
- Microbial Community Ecology and Physiology
- Evolutionary Game Theory and Cooperation
Queen Mary University of London
2016-2025
UK Centre for Ecology & Hydrology
2006-2021
University of London
2017
Dorset Green Technology Park
2006-2016
Mississippi State University
2012
Natural Environment Research Council
2011
HR Wallingford
2008-2010
Charles University
2009
University of Liverpool
1996-2005
Université de Bordeaux
1997
Summary Recent efforts to understand how the patterning of interaction strength affects both structure and dynamics in food webs have highlighted several obstacles productive synthesis. Issues arise with respect goals driving questions, methods approaches, placing results context broader ecological theory. Much confusion stems from lack clarity about whether questions posed relate community‐level patterns or species dynamics, what authors actually mean by term ‘interaction strength’. Here,...
Elevated fine sediment input from terrestrial and aquatic sources as a result of anthropogenic activity is widely recognized to impact negatively on ecosystems. In rivers, freshwater fish are exposed range impacts resulting pressures. To date, research the effects sediments has been concentrated within relatively few families, notably salmonidae. This paper reviews literature describing indirect direct contribution towards enhancing understanding activities We identify causal mechanisms that...
ABSTRACT The sustainable use of water resources requires clear guidelines for the management diffuse pollution inputs to rivers. Without informed guidelines, decisions are unlikely deliver cost‐effective improvements in quality rivers as required by current policy. Here, we review evidence available deriving improved on loading fine sediment based impact macro‐invertebrates. relationship between macro‐invertebrates and sediments is poorly defined. Studies impacts have been undertaken at...
The carbon cycle modulates climate change, via the regulation of atmospheric CO(2), and it represents one most important services provided by ecosystems. However, considerable uncertainties remain concerning potential feedback between biota climate. In particular, is unclear how global warming will affect metabolic balance photosynthetic fixation respiratory release CO(2) at ecosystem scale. Here, we present a combination experimental field data from freshwater mesocosms, theoretical...
Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable biodiversity loss
Alternative equilibria dominated by either submerged plants or phytoplankton have been described for communities in shallow lakes. A nutrient-mediated increase periphyton (algae attached to plant surfaces) is often as being responsible the loss of from lakes, yet this violates stochastic assumptions alternative equilibria. To determine if capable forcing a switch between these communities, factors governing success aquatic were surveyed 17 plant-dominated lakes Norfolk (United Kingdom) that...
ABSTRACT The interplay between erosion and deposition are fundamental characteristics of river basins. These processes result in the delivery, retention conveyance sediment through systems. Although delivery to rivers is a natural phenomenon, recent years there has been increasing concern about enhancement loadings as anthropogenic activities. presence macrophytes channels tends increase fine leading changes bed composition. However, complex relationship exists sediment: affect are, turn,...
The protection, preservation and restoration of aquatic ecosystems their functions are global importance. For European states it became legally binding mainly through the EU-Water Framework Directive (WFD). In order to assess ecological status a given water body, biodiversity data obtained compared reference body. quantified mismatch determines extent potential management actions. current approach assessment is based on morpho-taxonomy. This has many drawbacks such as being time consuming,...
Summary 1. Seasonal relationships between macrophyte and phytoplankton populations may alter considerably as lakes undergo eutrophication. Understanding of these changes be key to the interpretation ecological processes operating over longer (decadal‐centennial) timescales. 2. We explore seasonal dynamics macrophytes (measured twice in June August) monthly May–September) 39 shallow (29 U.K. 10 Denmark) covering broad gradients for nutrients plant abundance. 3. Three site groups were...
Abstract Sediment plays a pivotal role in determining the physical, chemical and biological integrity of aquatic ecosystems. A range factors influences impacts sediment pressures on biota, including concentration, duration exposure, composition particle size. In recognition need to assess environmental status for mitigate excessive habitats, both water column river substrate metrics have been proposed as targets. Water include light penetration, turbidity, concentration summary statistics...
Classical biomonitoring techniques have focused primarily on measures linked to various biodiversity metrics and indicator species. Next-generation (NGB) describes a suite of tools approaches that allow the examination broader spectrum organisational levels - from genes entire ecosystems. Here, we frame ten key questions envisage will drive field NGB over next decade. While not exhaustive, this list covers most challenges facing NGB, provides basis steps for research implementation in field....
Abstract While many studies have considered the ability of eDNA to assess animal communities in lacustrine settings, fewer riverine systems, particularly those spanning environmental gradients present large river basins. Such dynamic systems are challenging for biomonitoring due differing transport distances rivers and effects chemistry. To address this challenge, we focused on Thames River system, UK, which has exceptional historical fish records providing a baseline test accuracy...
Microplastics are now ubiquitous in freshwater environments. As most previous research has focused on species-specific effects of microplastics under controlled laboratory conditions, little is known about the impact at higher levels ecological organisation, such as communities and their associated ecosystem functions. To fill this knowledge gap, an outdoor experiment using 40 mesocosms, each 1.57 m3, was used to determine (i) microplastic type: traditional oil-based high-density...
Abstract As alien invasive species are a key driver of biodiversity loss, understanding patterns rapidly changing global compositions depends upon knowledge population dynamics and trends at large scales. Within this context, the Ponto-Caspian region is among most notable donor regions for aquatic in Europe. Using macroinvertebrate time series collected over 52 years (1968–2020) 265 sites across 11 central western European countries, we examined occurrences, invasion rates, abundances...
The zebra mussel Dreissena polymorpha is one of the most successful, notorious, and detrimental aquatic invasive non‐native species worldwide, having invaded Europe North America while causing substantial ecological socio‐economic impacts. Here, we investigated spatiotemporal trends in this species' invasion success using 178 macroinvertebrate abundance time series, containing 1451 records D. collected across nine European countries between 1972–2019. Using these raw (absolute) data,...